Branch flotation technology for silicon calcium collophanite

Abstract

The invention relates to a branch flotation technology for collophanite, which comprises the following steps: crushing and grinding silicon calcium collophanite ores, and then adding water and mixing into slurry, and guiding the slurry to flow into a flotation groove; adding a regulator and a collecting agent for mixing the slurry, and then pouring into a reverse flotation system for performing reverse flotation, wherein products in the groove are reverse flotation concentrates; grading the reverse flotation concentrates into coarse fraction and fine fraction; pouring the coarse fraction partinto a desilicification reverse flotation groove, adding a desilicification regulator and a desilicification collecting agent for mixing the slurry, and then pouring into a desilicification system for performing reverse flotation, wherein products in the groove are desilicification reverse flotation concentrates; pouring the fine fraction part into a normal flotation groove, adding a normal flotation pH (Potential of Hydrogen) regulator, the regulator and the collecting agent for mixing the slurry, and then performing normal flotation, wherein foam products of the normal flotation are normal flotation concentrates; mixing the normal flotation concentrates with the desilicification reverse flotation concentrates, thereby forming the final phosphorus concentrates; and concentrating, filtering and drying, thereby obtaining phosphorus concentrates. The branch flotation technology for collophanite has the advantages that the separation efficiency is high, the technic index is excellent, the content of MgO in the obtained phosphorus concentrates is lower, the quality of the concentrates is high, and the comprehensive cost of the final product of the phosphor concentrates is lower.

Description

technical field [0001] The invention relates to a phosphate ore beneficiation process, in particular to a flotation process suitable for medium and low-grade sedimentary siliceous-calcium colloidal phosphate rock. Background technique [0002] Sedimentary phosphorite ore (the phosphorus-containing mineral is collophoste) is the most important phosphate rock in the world's phosphate rock resources, accounting for more than 70% of the world's total phosphate rock reserves, of which the largest reserves and the most difficult to select are medium and low grades Silica collophosite. For this kind of ore, the carbonate and silicate impurities must be excluded at the same time in the beneficiation process, so as to meet the requirements of phosphate fertilizer processing. At present, most of the separation of this type of ore at home and abroad adopts flotation method for enrichment. The commonly used flotation processes include: forward and reverse flotation, reverse flotation, ...

AI Technical Summary

Problems solved by technology

Since the pulp pH regulator for the positive flotation of floating phosphorus is generally a weak base, a large amount of alkali needs to be neutralized from the acidic reverse flotation to the positive positive flotation of the alkaline, resulting in a high cost of mineral processing agents; in addition, the positive flotation of floating phosphorus Generally, the grinding fineness is required to be finer, which is suitable for the flotation of fine-grained phosphorus minerals, and the separation of coarse-grained phosphorus minerals is poor.

Because of the above-mentioned technical problems, the industrialization of the double reverse flotation process and the reverse flotation process of collophosphate is restricted.